td img {display: block;}

#mainPic {
  margin-top: -5px;
  margin-left: 0px;
  padding: 0;
}
 
#container {
  margin-left: -115px;
  padding: 0;
  width: 480px;
}

ul {float: left;}
 
ul li {
  list-style: none;
  display: inline;
}

ul li a:hover {
  opacity : 0.4;
  filter: alpha(opacity=40); // msie
  background-color: #000;
}

ul li a img {
  display: inline;
}